Snapshot Day 10/12/06 Data
(Salt Front RM 52.5)
RIVER MILE 14
Inwood Hill Park
Latitude 4050’N/ Longitude 7355’W
New York City Park Rangers
Susan Vincent and the Young Women’s Leadership School – 12th grade
Location: In the cove of Inwood Hill Park
Area: Forested
Surrounding Land Use: Forested 80%, Urban residential 10%, Industrial Commercial
5%, Other 5% . Forested and used by people for picnics, park use, walking dogs, kids
playing soccer. It’s like a public park.
Sampling Site: It is a salt marsh. Under 5 ft. the bottom is muddy, area covered with
vegetation, banks altered, large riprap on shoreline, collected wood/debris in area
Plants in area: The plants are growing in and on the water. They cover less than half the
area. Kate the ranger says the vegetation doesn’t grow here naturally. All the plants at
the park sampling area are exotic.
Water depth: 5 feet where seining; 3 feet where minnow pots deployed
River Bottom – muddy
ITEM
Time
Reading 1
Reading 2
Comments
Physical
Air Temperature
6:00 AM
20C
65 F
East
3:00 PM
27C
71 F
Wind Speed
Cloud Cover
Weather today
Weather recently
2 knots
Partly cloudy
No rain but drizzly and cloudy, cooler
Mon & Tues hot and sunny, yesterday (Wed) rain, wind and
cold
Water
Temperature
11:32 AM
11:38 AM
11:59 AM
66.38F
19.1 C
66.38F
19.1 C
68.54F
20.3 C
53.2 inches/
135.13 cm
YSI meter
Turbidity
(Site tube)_
12:06 PM
Chlorophyll
Sediment Core
description
11:42
Clay
abundant
Roots in
core
Didn’t match
Mud common
11:38 AM
9.5 mg/L
Temp.20.3 C
94% saturated
1:02 PM
7.8
8.0
Indicator sol.
9.8 ppt
10 ppt
10 ppt
CPUE
YSI meter
Chemical
DO
(drop count kit)
pH
Phosphate
Nitrate
Alkalinity
Salinity
Filtered120cc
Wood
common
No real layers
– just patches
of dark
56.4 inches/
143.26 cm
Macro’s rare
Surprised to
see no odor –
not organic
decomposition
10 ppm and
below
11:32 AM
Fish Catch
Number
Caught
Used seine 20 ft. X 1
30 ft. & minnow
traps
Seined
2
1
Minnow traps &
entry to cove
Minnow trap by
the dock
Minnow trap in
front of Nature
Center
Tides
6 inches long
55 inches/
139.7 cm
11:04
Species
Atlantic
Silversides
Seine &
Minnow traps
Seine 1 caught
1 fish
Comb jellies
White perch
Seine 2 caught
1 fish, 2 comb
jellies
227
mummichogs
365 total
mummichogs
138
mummichogs
11:34 AM
11:49 AM
12:04 PM
5 cm
20 cm
35 cm
0
Flood/rising
Flood/rising
Flood/rising
12:19 PM
30 cm*
Flood/rising
* Possibly a
wave
influenced this
reading
12:34 PM 33 cm
Flood/rising
12:49 PM 39 cm
Flood/rising
1:04 PM
43 cm
Flood/rising
1:19 PM
48 cm
Flood/rising
1:34 PM
53 cm
Flood/rising
40 cm/ 60 .666 cm/sec
North/flood
0.8 knots
Currents
secs
120 cm/60 2 cm/sec
North/flood
2.4 knots
secs
160 cm/60 2.6 cm/sec
North/flood
3.2 knots
sec
183 cm/60 3.05 cm/sec
North/flood
3.66 knots
sec
190 cm/60 3.16 cm/sec
North/flood
3.8 knots
sec
Nature Center is located on a peninsula where the Harlem River meets the Hudson
River. Currents can move very swiftly in this area.
12:23 PM Circle Line
Northbound
Loaded with
Traffic
Boat
passengers
Lots of ducks and geese around.
Other
Train Station nearby (Metro North) with train passing every hr.
observations
Lots of grass and plants still out even with weather starting to
change.
Little fish seen around rocks hiding or looking for food.